This is great, thanks. I have a question regarding what would be considered fair use. There is a lot of public domain FORTRAN code at Netlib and elsewhere that needs updating with something like plusFORT. If someone used plusFORT on such code and put it on GitHub, would you consider that fair use?
A situation where you are paid to modernize a company’s proprietary Fortran code would be different and should entail a purchase of plusFORT.